Yeah that’s true, but it’s not only his mind. Jumbo also thinks he’s their rider.
At one point just recently, Jumbo also thought Soudal Quick-Step & Evenepoel were going to be a part of their team as well. So I don't think they're best placed when it comes to a rational appraisal of separating dreams from reality.
The context is that Cian complained about his (lack of) windtunnel testing before the Vuelta, and the offer to go to California to test in the windtunnel came after Cian already 'decided' to leave Bora. Maybe the lack of wind tunnel testing before the Vuelta, in combination with Vlasov competing for GC positions, was what made Cian wanting to move teams.
Cian said in the Vuelta he was pushing the better numbers, but probably Vlasov has a better TT position and thus got approx. 1:30 in the TT on Cian, time Cian needed to defend his GC spot (which he lost with 7s to Vlasov). I'm pretty sure Cian thought he could have easily got those 7s if only Bora committed a bit more on his aero testing before the Vuelta / beginning of the season. If that's diva behaviour I don't know, but Cian clearly 'felt' he was entitled to have more support (read: investment by the team). I do think that he would have been better off to just swallow his pride / ambitions one more year but that's too late now.
It would be pretty inconsistent to go to California knowing you want to leave the team, no?
A 20 year old cyclist is never in a position to make such demands. It was his first GT, ever. He didn't even set the world on fire, did he? He has a lot to learn & improve on.
That shouldn't be a controversial viewpoint.